Antenna



FIG. 1 is a right perspective view an antenna showing my new design;

FIG. 2 is a left perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right elevational view thereof;

FIG. 5 is a left elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The structural features depicted by broken lines have been shown for the purpose of illustrating portions of the antenna that form no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 